Differences between omega equation in OF 1.6-ext and CFX 13.0

lentschi · November 17, 2011, 04:36

Hello,

I am going to use the steady CFX 13.0 solution as initialisation in OF 1.6-ext. How can I transorm the values of "omega" (OF and CFX use different euqations to calculate omega).
So does anybody now the constant factor, which allows you to convert between the two programs?

Thaks in advance.

Regards

timo_IHS · November 21, 2011, 08:08

Hallo,

what do you mean by "different omega values". Could you precise and for what application do you need it?

Best

romant · November 21, 2011, 08:47

The difference in the omega equation come probably from the version of the k omega sst model that is implemented in OF and CFX. OF uses the version from 2003 (look at the bottom for SST-2003 http://turbmodels.larc.nasa.gov/sst.html). I don't know which version is used by CFX. The result should be similar and a constant factor cannot exist.

November 17, 2011, 04:36	Differences between omega equation in OF 1.6-ext and CFX 13.0	#1
lentschi Member sirLentschi Join Date: Nov 2010 Posts: 87 Rep Power: 16	Hello, I am going to use the steady CFX 13.0 solution as initialisation in OF 1.6-ext. How can I transorm the values of "omega" (OF and CFX use different euqations to calculate omega). So does anybody now the constant factor, which allows you to convert between the two programs? Thaks in advance. Regards

November 21, 2011, 08:47		#3
romant Senior Member Roman Thiele Join Date: Aug 2009 Location: Eindhoven, NL Posts: 374 Rep Power: 21	The difference in the omega equation come probably from the version of the k omega sst model that is implemented in OF and CFX. OF uses the version from 2003 (look at the bottom for SST-2003 http://turbmodels.larc.nasa.gov/sst.html). I don't know which version is used by CFX. The result should be similar and a constant factor cannot exist. __________________ ~roman

November 21, 2011, 08:08		#2
timo_IHS Member Timo K. Join Date: Feb 2010 Location: University of Stuttgart Posts: 66 Rep Power: 16	Hallo, what do you mean by "different omega values". Could you precise and for what application do you need it? Best